Apparatus for shaping metal channel-bars.



1. w. ANDERSON.

APPARATUS FOR SHAPING METAL CHANNEL BARS.

APPLICATION FILED JULY l2. 1911.

l $266,545. Patented. May 21,1918.

2 SHEETS-SHEET l.

J.. W. ANDERSON. APPARATUS FOR SHAPING METALRCHANNEL BARS.

APPLICATIONA FILED JULY l2. 19H.

Patented May 21,1918.

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JOI-IN WILLIAM ANDERSON, OF HAMILTON, CNTARIO, CANADA.

APPARATUS FOR SHAPING- METAL CHANNEL-BARS.

Application med July 12, 1917.

Metal Channel-Bars, of which the follow-A ing is a specification.

This invention relates to apparatus for bending up metal strips to formchannel bars and more particularly channel barsy with incurved edgessuch as hereinafter described, and my object is to devise means forshaping the metal by a continuous process Without pressing or stamping.

I attain my object by means of the constructions hereinafter describedand illustrated in the accompanying drawings in which- Figure 1 is aplan view of my improved apparatus;

Fig. 2 a side elevation of the same;

Fig. 3 a longitudinal section of the same;

Fig. 4 a front elevation of the pair of rolls for-inwardly curving theedges of the metal strip; and

Fig. 5 a series of cross sections showing the various stages in formingthe metal channel from the viiat strip.

In the drawings like numerals of reference indicate corresponding partsin the different figures.

1 is the frame of the machine suitably shaped to support thedifferentparts. At one end of this frame are journaled a pair of rolls2-3. The lower roll is spool-shaped and the upper roll cylindrical, thatis, the metal strip 4 fed between them has its edges turned up at rightangles as indicated in Fig. 5.

From these rolls 2 3, the metal strip passes to the two pairs of rolls 5and 6 journaled at right angles to the rolls 2 3. The outer rolls 6 aregrooved, the bottoms of the grooves being substantially semi-circular.The inner rolls 5 are shaped to suitably coperate with the outer rollsto give the semi-circular inward curve to the edges of the metal stripshown in Fig. 5.

From the rolls 5 and 6, the metal strip passes to the rolls 7 and 8.These rolls are shaped to produce bends longitudinally of the metalstrip along lines located one at each side of the center of the strip,the portion of the strip between the said lines forming the bottom ofthe finished channel.

Specification of Letters Patent.

Patented May 21, 1918.

seriai No. 180,157.

From these rolls 7 and 8 the metal strip passes to a longitudinallyarranged die, of which 9 are the sides. These sides are twisted, thatis, at the end adjacent the rolls 7 and 8 the lines of their crosssections are substantially parallel to the outer parts of the metalstrip at each side of the bends hereinbefore referred to, but in thecourse of their length these sides turn so that the lines of their crosssections are substantially vertical as shown. The result is that as themetal strip is carried through the die, the longitudinal bends areincreased substantially to right angles so that the sides of the channelbars formed from the strips stand at substantially right angles to thebottom.

To suitably hold the strip in engagement with the die and to keep thebottom straight, I provide an. anti-friction roller 10 at the end of thedie closest to the rolls 7 and 8, which holds the metal strip down onthe parts of the die which are very nearly horizontal at this positionand contact with one another. I also provide a plurality of pairs ofanti-friction rollers 11, which engage the metal strip from above andbelow. These rollers do not need to be driven.

After passing from the die, the strip passes through the nishino' rolls12 and 13. Three airs of rolls are preferably employed, the rolls ofeach pair being of approximately the same shape, the lower rolls beingspoolshaped to fit the outside of the channel bar into which the striphas been formed, while the upper rolls pass through between the incurvededges to engage the bottom. These rollsy straighten the finished channeland remove all irregularities.

The rolls 2 and 3, 7 and 8 and the end rolls 12 and 13 are driven bymeans of the follow-- ing mechanism, but it is not usually necessary todrive the intermediate rolls 12 and 13. Longitudinally of the apparatusis journaled the drive shaft 14 provided with the usual fast and loosepulleys. By means of worm gearing 15, the drive shaft actuates thetransverse shaft 16, which is provided with the pinions 17. Thesepinions mesh with the gear wheels 18 on the lower rolls 3 and 8. Thelower rolls drive the upper rolls 2 and 7 by means of the gearing 19.The rolls 5 and 6 do not require to be driven.

The end rolls 12 and 13 are driven by the following mechanism. Wormgearing 20 is employed to drive the transverse shaft 21 from the driveshaft 14. On this transverse shaft are secured the pinions 22 which meshwith gear `wheels 23 ony the-*lower rolls 13.

rolls by means of the gearing 24. "The various rolls are adjustablysupported in a manner Vwell lino'wn'- 'in-'f the art, which adjustmentneed not therefore; be particularly described.

Fronithe above ydescription it, will be 'seen thatI `have vdevised amachine which `will satisfactorily attainthe vobjects of myfinvention asset out in the -preainble-tofthis specification.

What I claim asfmy invention is 1. In metal shaping apparatus,thegcoinbination of a pair of driven rolls adapted to turn up the edgesof a metal strip atright angles; two pairsofrolls journaled at rightangles tothe first mentioned rolls and adapted to inwardly curve thesaid upturned edges ;,a following pair of drivenvrollsvjournaledparallelto the first pair and adapted to slightly bend up thesides ofqthe strip along two lines .one at each-side ofthe center; a diefollowing the last mentioned rolls -havingfsides whose vfaoesare shapedto engage the sides ofthe strip and to; gradually increase the bendsat-the lines aforesaid to right angles as the strip passes through thedie; and anti-friction rolls engaging the center, part or bottom of the`strip as it passes through the dies to hold it `down in the-,die

andprevent deformation.

2. In metal shaping apparatus, the combination of a pair of drivenrollsladapted-,to turn up the edges of a metal stripat right angles ;1two pairs of rolls journaled at right angles to the first mentionedrolls and adapted to inwardly ycurve the said upturned edges; afollowing ,pair-ofdriven rolls ljournaled parallel to thelirstpairandadapted to slightly bend up the sides of the strip along twolines one at each side ,of the center; adie following thelastmentionedrolls having sides whose faces are shaped vto engage the sidesof the strip and to gradually 1n- 'crease the bends vatthe linesaforesaid to The upper rolls are driven from the lower right angles asthestrip passes through the die; anti-friction rolls engaging the centerpart or bottom of the strip as it passes Athroughthe dies to hold itdown iny the die and preveiit deformation; and one or more pairs offinishing rolls, each pair comprising a channel shaped roll-.ittingtheoutside of the finished metalstrip and a roll adapted topassbetweentheinturned edges of the strip andengage Aits bottom.

3.-"Inv1netal shaping apparatus, the combi- -nation offa y.pair ofdrivenrolls adapted to gage the si'desof the strip and togradually increasethe bends atfthe lines aforesaid to right angles as the strip passesthrough the die;anti-friction-rolls engaging the center part or bottomof the strip as itpasses through the, dies 4to hold I it down in the dieyand prevent deformation; two pairs of vdriven finishing rolls and anintermediate vpair of idleiwfinishingfrolls, eaehfpa-ir comprising achannel shaped roll fittii'i-g the outside of thefffinished ymetal stripVandfa `roll :adaptedto pass between the inturned edges of the stripandengage zits bottom.

:Signed at Hamilton, Ontario, Canada, this 9th day ofJune, 1917.

JOHN ILLIAM ANDERSON.

Witnesses BELLA JQ METCALF, I-I.; O.; PEPBER.

Goplel. ofr A.this patent maybe f obtained forvei cents each,lby,addressingfthe (l,oxnmiseiitniex'l ofbratentss Washington, IJ.` G.

